desktop->ibus->general
[preload-engines] varies with each user.

/etc/dconf/db/ibus.d/00-input-languages
[desktop/ibus/general]
preload-engines=['chewing', 'libbopomofo', 'libpinyin', 'xkb:gb:dvorak:eng', 'xkb:us::eng', 'kkc', 'xkb:kr:kr104:kor']
engines-order=['xkb:us::eng', 'chewing', 'libbopomofo', 'libpinyin', 'xkb:gb:dvorak:eng', 'kkc', 'xkb:kr:kr104:kor']